Pro-Bowl RB David Johnson's Knee Looks Healthy as He Explosively Jumps Out of a Pool

Arizona Cardinals running back David Johnson has emerged as one of the best running backs in the NFL. The All-Pro back finished the season ranked seventh in rushing yards with 1,239 and second in touchdowns with 16. The 24-year-old was voted into his first Pro Bowl, but because of a knee injury, he could not play.

That game was on Jan. 1, but by Feb. 8 he was back doing incredible things. Johnson Tweeted a video of himself performing a Pool Box Jump out of thigh-deep water. The exercise requires great explosive power, and the water provides resistance to strengthen his lower-body muscles.

While the feat was impressive, the exercise is also very dangerous. All it takes is one wrong move for something bad to happen. If you're trying to work on lower body explosion, we recommend a different exercise. Check out the link below for a safer way to become more explosive.